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Regular inspection of distribution line is an important link to maintain the normal operation of distribution network. Using unmanned aerial vehicle (UAV) instead of manpower can save the cost of inspection. With the universal application of vision sensor in UAV and the rapid development of deep learning, Convolutional Neural Networks (CNN) is applied to the detection of power line in UAV visible images. In view of the lack of application environment inspection methods for distribution line, a vision-based UAV distribution line inspection method using deep learning and a dataset for the deep learning method of distribution line inspection task are proposed in this paper. The method proposed predicts distribution line area through the encoder-decoder structure network firstly. Image processing operation and sampling clustering are used to remove the interference. Finally, the UAV tracking direction of distribution power line is calculated according to the detected distribution line. The method can reach an inspection speed of nearly 77ms per frame, the range of heading deviation error can reach (-1.52°, 1.36°), the tracking rate nearly 100%. Through the test of network and inspection method on dataset, the results show that the method proposed in this paper can be effectively, quickly and accurately applied to UAV distribution line inspection.

Recently, photoinduced associative ionization (PAI) has been demonstrated to be extremely efficient for the determination of oxygenated volatile organic compounds. However, its application for the determination hydrocarbons has not yet been reported. In this study, associative ionization of nine typical monoterpenes induced by dichloromethane (CH2Cl2) under vacuum ultraviolet (VUV) light was investigated using a laboratory-constructed PAI time-of-flight mass spectrometer (PAI-TOFMS). Without doping CH2Cl2, VUV light generated ordinary photoionization mass spectra of monoterpenes that were dominated by fragment ions, while the molecular ions were inconspicuous. In contrast, doping with CH2Cl2 resulted in the appearance of mass peaks of the characteristic protonated molecular ions of the monoterpenes. The PAI method significantly enhanced the signals for the monoterpenes. The intensities of protonated molecular ions derived from PAI were amplified by 52 to 108 fold compared with those of molecular ions produced by VUV photoionization (VUV PI). With the high ionization efficiency of PAI toward monoterpenes, the sensitivities of PAI-TOFMS toward limonene, ��-ocimene, ��-myrcene, ��-pinene, and ��-pinene were from 291 �� 6 to 1338 �� 20 counts pptv���1 using an acquisition time of 30 s. The limits of detection were from 0.32 to 1.45 pptv, equivalent to between 1.92 and 8.83 ng m���3. The applicability of this ionization mode was further characterized by the determination of monoterpenes from potted Sabina chinensis. This study provides a new and highly efficient ionization method for the determination of plant monoterpenes using mass spectrometry.

Using the ecological civilization demonstration zone as a quasi-natural experiment, this study has explored the effect of it on air pollution in China by employing the difference-in-differences model and the spatial difference-in-differences model, and further tested the political promotion tournament in China by employing the binary logit model. The results show that the ecological civilization demonstration zone has basically and effectively reduced air pollution, except for carbon monoxide and ozone. In addition, the spatial spillover effects of the ecological civilization demonstration zone on air pollution are not only basically supported among the treated cities, but also extremely established in the untreated cities neighboring the treated cities. Furthermore, no clear evidence supports the establishment of the political promotion tournament in China, while local cadres tend to cope with the assessment of higher officials passively rather than actively. Overall, this study sheds light on the coordination of economic development and ecological civilization from the perspective of the career concerns of local cadres.

CD8

To solve the fatigue crack initiation problem, it is necessary to calculate the fatigue crack initiation size. According to the aspect of macroscopic crack development, the calculation method of crack initiation size is determined by the critical dimension of fatigue crack initiation. Simultaneously, the elastic–plastic fracture mechanics (EPFM) method is used to study short crack fatigue life by considering the cumulative damage rule of crack initiation life, and the calculation model of fatigue crack initiation size caused by symmetric cyclic torsional alternating stress is established under low strain. The crack initiation dimension of component is estimated, which lays a foundation for the study of fatigue life. Then the feasibility of this method is verified by comparing with the crack initiation size, which is determined by predicting the non-propagating crack size (NPCS).

Limited is known about role of gut microbiota in the metabolism of high-altitude-living herbivores, and potential co-evolution between gut microbiome and host genome during high altitude adaptation were not fully understood. Here, DNA from faecal samples was used to investigate the gut microbial compositions and diversity in three host species endemic to the high-altitude Tibetan plateau, the Tibetan antelope (Pantholops hodgsonii, T-antelope, 4300 m) and the Tibetan wild ass (Equus kiang, T-ass, 4300 m), and in the Tibetan sheep (Ovis aries, T-sheep) collected from two different altitudes (T-sheep [k], 4300 m and T-sheep [l] 3000 m). Ordinary sheep (O. aries, sheep) from low altitudes (1800 m) were used for comparison. 16S rRNA gene sequencing revealed that the genera Ruminococcus (22.78%), Oscillospira (20.00%), and Clostridium (10.00%) were common taxa in all high-altitude species (T-antelope, T-ass and T-sheep [k]). Ruminococcaceae, Clostridiales, Clostridia, and Firmicutes showed greater enrichment in the T-antelopes’ gut microbiota than in the microbiota of lower-altitude sheep (T-sheep [l] and sheep). The T-antelopes’ gut microbiota displayed a higher ratio of Firmicutes to Bacteroidetes than lower-altitude sheep (T-sheep [l] and sheep). A functional capacity analysis of the paired-end metagenomics sequences of the gut metagenomes of high-altitude T-antelopes and T-sheep annotated over 80% of the unique genes to metabolism (especially carbohydrate metabolism pathways) and genetic information processing in the Kyoto Encyclopedia of Genes and Genomes database. The gut metagenome of the T-antelope may have co-evolved with the host genomes (e.g. glycolysis and DNA repair). The higher-altitude herbivores tended to have similar gut microbial compositions, with similar functional capacities, suggesting that their gut microbiota could involved in their high-altitude adaptation.

Since small sample data are obtained in the material fatigue life test, the result of S-N curve can deviate greatly from the real results. In order to address this kind of problem and improve the credibility of S-N curve, we introduce the error circle in the Bootstrap method, which makes the results of the sample more reasonable. Bootstrap error circle method is proposed in this paper, and the parameter characteristics of samples in the error range such as mean and confidence interval by processing the original samples are acquired, which improves the reasonable of the samples. The Bootstrap error circle method is used to modify the limitations of the Bootstrap method so as to reduce the sample error and obtain a more reasonable estimate. In this paper, a more reasonable S-N curve is obtained, and it can predict the life of product.

ObjectiveThis study was conducted in order to investigate the association between radiomics features and frontal glioma-associated epilepsy (GAE) and propose a reliable radiomics-based model to predict frontal GAE.MethodsThis retrospective study consecutively enrolled 166 adult patients with frontal glioma (111 in the training cohort and 55 in the testing cohort). A total 1,130 features were extracted from T2 fluid-attenuated inversion recovery images, including first-order statistics, 3D shape, texture, and wavelet features. Regions of interest, including the entire tumor and peritumoral edema, were drawn manually. Pearson correlation coefficient, 10-fold cross-validation, area under curve (AUC) analysis, and support vector machine were adopted to select the most relevant features to build a clinical model, a radiomics model, and a clinical–radiomics model for GAE. The receiver operating characteristic curve (ROC) and AUC were used to evaluate the classification performance of the models in each cohort, and DeLong’s test was used to compare the performance of the models. A two-sided t-test and Fisher’s exact test were used to compare the clinical variables. Statistical analysis was performed using SPSS software (version 22.0; IBM, Armonk, New York), and p <0.05 was set as the threshold for significance.ResultsThe classification accuracy of seven scout models, except the wavelet first-order model (0.793) and the wavelet texture model (0.784), was p = 0.008) with 82.0% and 78.2% accuracy, respectively.ConclusionRadiomics analysis can non-invasively predict GAE, thus allowing adequate treatment of frontal glioma. The clinical–radiomics model may enable a more precise prediction of frontal GAE. Furthermore, age and pathology grade are important risk factors for GAE.

In our recent study (Fu et al., 2021), 70 wt% 2-ethylhexan-1-amine (EHA) + 30 wt% diglyme was proven to be a promising system for carbon dioxide (CO2) absorption. In this work, the capture performance of 15 kPa CO2 in 70 wt% EHA + (30 or 25 or 20) wt% diglyme solution was investigated. The evolution of solution composition during the capture process was identified. The time-dependent absorption and desorption capacities were accurately correlated by using the modified Avrami model. After 90 min of absorption, the proposed sorbents maintained relatively low viscosities (≤32.07 mPa s) and had much lower heat capacities than the aqueous 30 wt% ethanolamine (MEA). The CO2 desorption capacities of the sorbents containing 0 wt%, 5 wt% and 10 wt% water were higher than that of the aqueous 30 wt% MEA by 134.1%, 123.6% and 91.7%, respectively. The regeneration efficiency of the sorbents containing 0 wt%, 5 wt% and 10 wt% water was 92.1%, 87.9% and 83.8%, respectively, in the 5th absorption (313 K) - desorption (373 K) cycle. Furthermore, it is encouraging to note that the energy consumption for CO2 desorption of proposed sorbents was below 20% of that of the aqueous 30 wt% MEA.

A stringent signal amplification method to profile microRNA (miRNA) expression within a specific cell remains a key challenge in biology. To address this issue, we report a target-cell-specific DNA nanosystem for endogenous adenosine-5'-triphosphate (ATP) bioorthogonal activation of the hybridization chain reaction (HCR) to spatiotemporally controlled signal amplification detection of miRNA in vitro and in vivo. The system consists of ATP aptamer-sealed engineered HCR functional units combined with a cancer cell membrane-encapsulated glutathione (GSH)-responsive metal-organic framework (MOF). Once the nanosystem is specifically and efficiently internalized into a cancer cell through membrane-mediated homing targeting, the MOF structure degrades and releases HCR functional units. The endogenous high expressional ATP recognizes the aptamer, allowing the HCR functional units to adopt its active modality. The activated HCR functional units are then able to spatiotemporally and bioorthogonally image miRNA with high sensitivity in vitro and in vivo.

With the continuous development of the Internet, the number of web pages is growing rapidly. How to find the webpage information people need in a total number of web pages has become a difficult challenge. In many web pages, manual classification is obviously unrealistic. In view of the difficulty in obtaining tools or software that can be used for automatic classification of web pages [1,11,12,13] on the Internet, this topic designs and implements a web page classification tool based on word vector. With this tool, we can classify a large number of uncategorized pages based on some of the pages that have been classified.This article will discuss the overall architecture, design and implementation process of the web page classification tool and the classification process of the tool. At the same time, the article tests the usability and practicability of the tool, and the test results have positive significance for the use and evaluation of the tool.

Background Frequently abnormal vascularization and immunologic derangement have been uncovered in malignant tumors. In present research, we evaluated prognostic characteristic and clinicopathological features of vessels encapsulate tumor clusters (VETC) and the immune checkpoint molecule, programmed cell death-ligand 1 (PD-L1) in patients diagnosed as intrahepatic cholangiocarcinoma (ICC). Methods VETC and PD-L1 were investigated in two cohort enrolling 412 ICC patients. VETC and PD-L1 was easily detectable in whole slides and tissue microarray (TMA). Prognostic analysis was performed through Kaplan-Meier cures, log-rank tests and nomograms. Results VETC+ was significantly associated with aggressive tumor features. VETC+ predicted a significantly unfavorable survival and higher metastasis and recurrence rates. Furthermore, nomograms integrated by the combination of VETC and PD-L1, that heralded better prognostic value compared to previous staging systems. Conclusions Heterogeneous patterns of VETC phenotype and PD-L1 status were both illustrated to be an independent prognostic predictor for clinical outcomes. Therapies designed to target both vascularization and autoimmunity may open a novel direction for HCC. HCC should be replaced by ICC.

Quantum dynamical calculations of the H + LiH+ → Li+ + H2 reaction were performed based on the potential energy surface (PES) reported by Dong et al. (RSC Adv. 7, 7008 (2017)) using the time-depend...

The effects of the rovibrational excitation of reactants in the N(2D) + D2(X1Σg+) → ND(X3Σ+) + D(2S) reaction are calculated in a collision energy range from the threshold to 1.0 eV using the time-...

To improve the shortcomings of peak over threshold (POT) extrapolation method and reflect the diversity and dynamics of road conditions, an improved POT extrapolation method to reconstruct the load sequence in the middle of threshold is proposed. Based on the improved extrapolated load, the distribution characteristics of mean and amplitude are analyzed and the two-dimensional joint probability distribution is established. To discuss the influence of low load strengthening characteristics on fatigue life under random load, based on the two-dimensional joint probability distribution, the theory of low load strengthening is introduced in compiling load spectrum. The fatigue life predicted by 8-level load spectrum and 10-level strengthened load spectrum are compared with the test results, respectively. Which verifies the effectiveness and accuracy of life prediction based on improved POT extrapolation and low load strengthening under random load.

The North Qaidam orogenic belt (NQOB) is generally considered to be an early Paleozoic ultrahigh pressure metamorphic belt, but increasing reports of the Neoproterozoic magmatic and metamorphic events indicate that the NQOB probably also experienced the assembly of the Rodinia. However, the Neoproterozoic evolution of the NQOB is not well constrained due to the sparse records and ambiguous nature of the Neoproterozoic metamorphism. In order to reveal the multi-orogenic history of the NQOB, an integrated study of petrology, phase equilibrium modelling and geochronology was conducted on an epidote eclogite and host garnet mica schist from the Yuka–Luofengpo terrane. New zircon and monazite U–Pb ages show that the protolith of the garnet mica schist was deposited during 994–920 Ma and experienced Neoproterozoic (920–915 Ma) and early Paleozoic (451–447 Ma) polyphase metamorphism together with the enclosed eclogite. Relic omphacite inclusions were first identified in garnet and early Paleozoic zircon domains from the garnet mica schist, which provide solid evidence for the early Paleozoic eclogite facies metamorphism of the mica schist. Similar early Paleozoic peak P–T conditions of >27.4 kbar/613–670 °C and 30.2–30.8 kbar/646–655 °C were obtained for the garnet mica schist and enclosed eclogite, respectively, indicating that eclogites and their host paragneisses in this region underwent continental deep subduction as a coherent metamorphic terrane in early Paleozoic. The peak P–T conditions of the Neoproterozoic metamorphism were roughly constrained at 7.7–12.0 kbar and 634–680 °C for the garnet mica schist, based on stability field of mineral inclusions in Neoproterozoic zircons domains in P–T pseudosection, the relic garnet core composition and Ti-in-zircon thermometer. The high thermal gradients (16–37 °C/km) defined by presently our and previously reported P–T conditions indicate that the Neoproterozoic metamorphism likely occurred in continental collision setting at >945–890 Ma. Since the Grenvillian syn-orogenic granitic magmatism and metamorphism (ca. 1.0–0.9 Ga) in the NQOB are much younger than the Grenvillian orogeny in the central part of Rodinia, the Qaidam Block was probably located at the north margin of Rodinia in Neoproterozoic.

To improve the service quality of complaint handling service in a manufacturing company, it is key to analyze the business processes. Process mining is quite a useful approach to diagnose complaint handling service process problems, such as bottlenecks and deviations. However, the current business process analysis methodologies based on process mining mainly focus on operational process analysis and neglect other system level analysis. In this study, we introduce the method of Accimap from the discipline of accident analysis to analyze the diagnosis results of process mining. By creating a complaint handling service process management Accimap model, the process mining results analysis can be carried out across different system levels. A case study in a big manufacturing company in China is implemented to verify our approach. In the case study, 42 complaint handling process management factors are identified and the complaint handling process management Accimap model is created. The testing results by Rasmussen&rsquo, s seven predictions in his risk management framework show that Accimap method presents a systematic approach to analyze the process diagnosis results based on process mining.

Guar gum is an important raw material in the food, textile and oil industries, but the biosynthesis of guar gum remains unclear. To illuminate the genes involved in guar gum biosynthesis, guar beans from 30 and 40 days after flowering (DAF) were used for RNA sequencing in this study. A total of 2,535 and 2,724 preferentially expressed genes were found in 30 and 40 DAF endosperm, and 3,720 and 2,530 preferentially expressed genes were found in 30 and 40 DAF embryos, respectively. Of these, mannan synthase genes, α-galactosyltransferase genes and cellulose synthase genes were preferentially expressed in the endosperm from 30 and 40 DAF. The high expression level of these glycometabolism genes in endosperm is consistent with the expectation that the main component of guar gum is galactomannan. We believe that genes related to guar gum biosynthesis found in this study will be useful for both new variety development via genetic engineering and synthetic biology research on guar gum biosynthesis in the future.

The Hudian gneissic monzonitic granite with lentoid dark enclaves and foliated mafic dykes was exposed in the western segment of the North Qinling Orogenic Belt (NQOB). It has long been considered as an intrusion into the Kuanping Complex, the northernmost component of the NQOB. LA–ICP–MS zircon dating yields consistent formation age of ca. 1.77 Ga for the granite and dark enclaves and the same metamorphic age of ca. 400 Ma for the granite and the mafic dykes. The formation age of ca. 1.77 Ga of the Hudian pluton is much older than the deposition age ( The granite is low in Al2O3, CaO, MgO and Mg# high in SiO2, Na2O + K2O, Fe2O3T, Zr and 10,000*Ga/Al, and displays slightly right dipping “gull-wing” shaped rare earth element patterns, agreeing well with the features of A-type granites; the dark enclaves are basalt-andesitic rocks and show characteristics of crust-contaminated continental within-plate basaltic rocks, all suggesting a tectonic setting of extension. The major and trace element compositions of the Hudian monzonitic granite and its dark enclaves and the zircon eHf (t) values (−12.1 to −7.1) of the Hudian monzonitic granite all show strong comparability to the 1.75–1.8 Ga A-type granites and coeval intermediate-basic rocks of the Xiong’er Group in the southern North China Craton (NCC), indicating that the Hudian pluton maybe initially formed in the southern NCC. Considering the absence of obvious 1.75–1.8 Ga detrital zircon records in the Kuanping Complex, and the common metamorphic age of ca. 400 Ma in the Kuanping Complex and Hudian pluton as well as other units of the NQOB, we propose that the NCC has no affinity to the NQOB and the Hudian pluton was involved in the NQOB during the collision between the southern NCC and the NQOB at ca. 400 Ma.

To design a reasonable dimensional tolerance of a transmission shaft, the higher product quality while lower manufacturing cost must be considered. This paper provides a mathematical model and a flowchart which elucidates the relationship between process capability index (PCI), reliability, tolerance and manufacturing cost, considering the characteristics of the shaft diameter, the material and manufacturing process. A 10.904% cost reduction under certain PCI range of a real case shows the effectiveness of the model and flowchart, thus it can be applied to those technical area when optimizing product design.

The Algorithm for Inventive Problem Solving (ARIZ) is a very good tool to solve complicated problems. However, it is fussy to get a specific solution under the guides of ARIZ in the Theory of Inventive Problem Solving (TRIZ). A novel approach to getting solutions for inventive problem solving in TRIZ is shown in this paper. A model named 5-R model of finding specific solutions was developed. 5-R model has four steps to obtain specific suggested solutions for technical problems. Reason-occurred-analysis is the first step in this new model. Then a clear statement of the Ideal Final Result is used to encourage breakthrough thinking and get solutions to the problem. After that, suggested resolutions can be obtained with the Contradiction Matrix, the Physical Contradiction, the Substance-Field, the Effects, Function Analysis, System Enhancement route, and Substance-Field Analysis. Finally, a reasonable specific solution for innovative problem solving can be gotten using resource analysis. 5-R model is not difficult to learn and remember. 5-R model improves the efficiency of getting solutions with TRIZ. Finally, a practical engineering problem was solved using this now model successfully.

The current distributions over carbon steel under iron red alkyd primer exposed to 3.5% sodium chloride solution were mapped using the wire beam electrode (WBE). The electrochemical impedance spectroscopy (EIS) of the WBE was carried out to analyze the performance of coating delamination and corrosion behavior of carbon steel beneath defective coating. The EIS data revealed that protective capability of coating decreased with immersion time and the degree of cathodic delamination showed a rapid rise. The current density distribution of WBE indicated that cathodic sites was located at the defect at the beginning of immersion and gradually spread into the intact coating. The cathodic regions were distinguished from the anodic area and distributed over the WBE. The changes of cathodic sites could reflect the deterioration process of defective coating. The cathodic area ratio was a more useful parameter than the cathodic delamination degree to evaluate the coating cathodic delamination. The polarity reversals of electrodes at the defect and beneath coating were observed. A simple discussion of relationship between the blister and the polarity reversal was made from a standpoint of electrochemical distribution. WBE method was able to map and record the changes of local cathodic sites beneath defective coating in real time, which could provide more detailed information about the local degradation of coating.

Corrosion behavior of carbon steel under seawater film with various thickness was investigated by the wire beam electrode (WBE) method. It was found that the corrosion rate of carbon steel increased significantly under thin seawater film than it was immersed in seawater. The current variation under seawater film indicated that the thickness of diffusion layer of oxygen was about 500 μm, and the maximal current appeared around 40 μm, at which corrosion rate transited from cathodic control to anodic control. The results suggest that WBE method is helpful to study the corrosion process under thin electrolyte film.

As more and more power is consumed in servers, growing attention has been paid to power management. However, little work has been dated on the power-efficiency of query execution plans generated by the DBMS. Traditional optimal query execution plan does not take power-efficiency into account. This paper tries to generate a power-efficient query execution plan by redesigning the query optimizer of the database. We build a power model to estimate the power consumption of a query execution plan and propose an algorithm to generate the power-efficient query execution plan. Using two experiments based on the TPC-H benchmark, we evaluate the accuracy of our power model and compare the power-efficient query execution plan with the traditional optimal query execution plan. Keywords-query execution plan; power-efficiency; power

The effects of macrophages activated by bacterial lipopolysaccharides (LPS) on the mechanical activity of lymph vessels with or without the endothelium were investigated using conventional bioassay preparations. Rat peritoneal macrophages emigrated by an injection of thioglycollate were isolated and cultured for 12 h in RPMI 1,640 medium containing 10 micrograms/ml LPS. More than 97% of the cultured cells were stained with monoclonal antibody ED1 and demonstrated phagocytosis of acetylated low-density lipoprotein. The supernatant of the macrophages (M phi) suppressed significantly the basal tone of the lymphatic bioassay rings precontracted by 10(-8) M U46619. The M phi-induced vasodilation of the lymph nodes was significantly reduced by 12 h preincubation of the macrophages with 5 x 10(-5) M N omega-nitro-L-arginine methyl ester (L-NAME), 10(-5) M indomethacin, 10(-6) M dexamethasone, or 10(-5) M cycloheximide. Simultaneous preincubation of L-NAME and indomethacin caused a synergistic reduction of the M phi-induced vasodilation of the lymphatic bioassay rings. The superfusion of Krebs-bicarbonate solution containing 5 x 10(-5) M L-NAME, 5 x 10(-5) M aspirin, or the culture medium with no macrophages caused no significant effect on the M phi-induced vasodilation. These findings suggest that macrophages activated by bacterial LPS produce a marked relaxation of lymphatic smooth muscles through the co-release of nitric oxide and vasodilative prostaglandins, which may result in the facilitation of edema formation in wound tissues.